E2S Electronic Engineering Solutions, S.L.
Any device whose MAC address begins with 00:12:9B has a network interface built by E2S Electronic Engineering Solutions, S.L.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.
- OUI prefix
- 00:12:9B
- Organization
- E2S Electronic Engineering Solutions, S.L.
- Address
- Sant Ferran 10 Barcelona ES 08031
- Source
- IEEE OUI registry
Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.
Assignment history (1)
The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.
- 2026-07-17Assigned to "E2S Electronic Engineering Solutions, S.L."